"C:\Program Files (x86)\MiKTeX 2.9\miktex\bin\latexdiff" "C:\Users\vdusa\Documents\LEdProjects\School\PERT\pert_posted_01.tex" "C:\Users\vdusa\Documents\LEdProjects\School\PERT\pert.tex" > "C:\Users\vdusa\Documents\LEdProjects\School\PERT\pert_diff.tex"
@pdflatex pert_diff.tex  
@pdflatex pert_diff.tex